axalic acid again sory

[john m]

forum searsh not working
is there diffrent kinds if so what kind do i buy what is the best method and strenth for white hull and deck

 

[whipper_snapper]

Search for oxalic acid, brings up lots of posts.

 

[Bodach na mara]

Re: Oxalic acid again sory

You want the crystalline sort and make it up at ten percent as far as I remember. That is 100 grams of crystals to 900 ml of water (warm.) Remember the health risks of the stuff and wear gloves, eye prptection and a dust mask until it is disolved. It is toxic if ingested and reports have it aas harmful by absorption through the skin as well. Suppliers include AGW Woodcare.

I have been looking for suppliers near Glasgow (to avoid postage) and came up with several names, none of whom actually sold it when I called to confirm.

 

[sunquest]

For sure Boots the chemist will supply Oxalic acid in crystal form.

 

[john m]

Re: Oxalic acid again sory

is this the right stuff seems a good price
the forum will not allow here is the link
mehttp://constructionchemicals.co.uk/cgi-bin/sh000001.pl?REFPAGE=http%3a%2f%2fconstructionchemicals%2eco%2euk%2facatalog%2findex%2ehtml&WD=oxalic&PN=joinery_products%2ehtml%23a77#a77 to use search there is a problem

 

[john m]

Re: Oxalic acid again sory

http://constructionchemicals.co.uk/acatalog/index.html
sorry this place

 

[VicS]

Re: Oxalic acid again sory

[ QUOTE ]
is this the right stuff seems a good price
the forum will not allow here is the link


[/ QUOTE ] Yep that appears to be the stuff. In the Joinery section .

http://constructionchemicals.co.uk/acatalog/joinery_products.html

Also sometimes found listed under its proper chemical name, ethanedioic acid

I would not bet my boots on Boots getting it for you. Some branches will but I don't think they all will. Same goes for your local Pharmacy i imagine.

Remember it is hazardous and fairly toxic so handle with care, (gloves and goggles) label any solutions keps and keep out of sight and reach of children. It's not what i would regard as seriously dangerous to handle though.

 

[duke]

I bought a 1kg tub of Oxalic acid crystals 2 years ago from AG WOODCARE
PRODUCTS LTD, Waterloo Industrial Estate, Bidford-on-Avon, Warwickshire B50 4JH. Tel. 01789 778628Web site: www.agwoodcare.co.uk.
Instructions on tub (think it recommended a 5% solution).

 

[Spyro]

Got mine on Ebay.

 

[FlorealIII]

Sorry kenjohnson but a ten percent solution is prepared as follows : weigh 100 g and fill up to 1 liter with water which is totally different from 100 g + 900 ml water .

 

[William_H]

For Oz forumites I have finally found Oxalic Acid in Bunnings (hardware chain). It goes by the name of Rust and Stain Remover (Oxalic Acid) and is packed by "Diggers in a 500gm plastic jar. It was in the section devoted to paving and concrete colourings and cleaners. It was about $3 I think.

So now I can finally find out about this stuff that is mentioned on the forum so much. olewill

 

[Dave99]

Dont forget to use gloves and wash everything thoroughly. Oxalic acid is horrible stuff - it is highly poisonous and can harm marinelife if released into the water in any significant concentration.

A couple of teaspoonfuls is plenty for a couple of litre of water.

There are other products available which wont kill the fish!

David

 

[VicS]

[ QUOTE ]
Sorry kenjohnson

[/ QUOTE ] Splitting hairs I think for the purposes to which this solution is going to be used. Anyway Ken Johnson's recipe would be perfectly correct to make a solution that is 10% by weight ie 10g oxalic acid per 100g of solution.
Common laboratory practice would be to dissolve 100g in 1000cc of water and leave it at that! Only if one was preparing a solution for analytical purposes would one bother to make the final volume precisely 1000cc.


Scrim,
You ask if there are different types. Well not that you need worry about. Almost certainly what you buy will be the dihydrate. That means that for every molecule of oxalic acid in the crystals there will also be two molecules of water, making it approx 71% oxalic acid and 29% water.
That puts a whole new slant on the argument above doesn't it?

Don't be scared by Dave99's asertion that it is horrible stuff and highly poisonous. it is in fact classed as corrosive and harmful. The lowest published lethal dose is 600mg per kg of body mass, but follow the safety advice I gave earlier.

Safety data from Oxford University here: http://ptcl.chem.ox.ac.uk/MSDS/OX/oxalic_acid_dihydrate.html

Also while on the subject and before anybody else mentions rhubarb see http://www.rhubarbinfo.com/